Steel alloy



MM Mar. 29, 1927 UNITED STATES PATENT OFFICE.

JOSEPH w. wm'rznnxoim, or rrnrsnumin, PENNSYLVANIA, ASSIGNOB. 'ro uomrmmmm conronA'non or AmmIcA, or rrr'rsnnnen, rENNsYLvAmA', A conroaA- T1011 DELAWARE.

Io Drawing.

In my United States Patent No. 1,287,153, i

istic feature of the alloy being that it has great strength and ductility" throughout a wide range of heat treating temperatures. Specifically, as disclosed in the patent, the high elastic limit and tensile strength of the alloy vary relatively little throughout a.

drawing and annealing range, of tempera tures of from about 500 to 1200 F. and even at the lowest of these drawing and annealing temperatures the steel is quite ductile, hav-' impurities and other elements customarily found in steel as a resultof manufacturing processes.

My present invention relates to alloy steels such as disclosed in my said patent, and is predicated upon my discovery that an alloy steel having the s a me content of chromium and vanadium as that disclosed in the patent, butwhich contains carbon up to about 2.50 per cent and molybdenum up to about .48 per cent possesses substantially the same physical c aracteristics as the alloy of the p nt ing a reduction of area of vabout per cent.

elastic limit and ultimate and is swear. ALLOY.

Application and amen so. 1920. swarm. 9am.

The alloy provided according 'to this' invention contains carbon up to about 2.50

per cent, from about .50 to 1.45 per cent chromium, from about .10to .50 per cent vanadium, and molybdenum up to about .48 per cent, the remainder being iron except 40 for-the usual amounts of other elements such as sulphur, phosphorus, silicon and manganese which are ordinarily present as impurities or: as incidental to manufacturing processes. should be as low as possible, while silicon, and manganese may be present to the extent usually found in most steels.

Within drawing and annealing temperatures of from about 500 to 1200 F., this 60 steel alloy has very high strength, both uite ductile even when drawn and. annealed rom the lowest of these temperatures.

I claim as myinvention: v .55

A steel alloy consisting of an appreciable and effective amount of carbon up to about 2.50 per cent, from about .50 to. 1.45 per cent chromium, from about .10 to .50 per cent vanadium, and an appreciable and C JOSEPH w. WEITZENKORN. a

The sulphur and phosphorus 5 

